Electric motor



V. APPLE,

ELECTRIC MOTOR.

Patented Feb. A21, 1922:

3 SHEETS-SHEET l.

\/. G. APPLE.

ELECTRIC MOTOR.

APPLICATION FILED AUG.6, 191.9. IIa-@Lamed Feb. 21, 1922.

3 SHEETS-SHEET 2.

Pfg. 2.

STATES UNITED ELECTREC MEDR.

increases. Y

Specieaton of Letters Patent.

ined 21, 1.922,.

Application filed August 6, 1919. Serial No. 315,771.

' To all whom-2f may concern:

Be it known that l, VINCENT Aprile, a citizen ot the `United States, residing at Day* ton, in the county' ot Montgomery and State of Ohio, have invented certain new and uscful improvements in Electric i'iotoi's, ot

vwhich the following; is a specification.

The invention relates to improvements in electric motors and has especial releiencc to motors for sewing' machines and means i'or mounting them on the driven shat't or such machines.

One of the objects ot the invention is to i generally improvedevices of the aioiesaid character.

Another and more specific object is to provide a convenient means of utilizingY the preexisting clutch on sewing machines, which is employed for connecting' the usual 'fly wheel to the driven shaft o'j the machine, and which l employ for connecting iav especially designed motor to the mach .'ie, Vby means of which the motor may be disconnected Jfrom the machine, and operi ted inde pendently thereof, to wind bobbins, or 'for doing other useful work, such 'tor as driving' knitting' machines, fans, and the like.

ther, further and inore of my invention will becor e ent, to persons skilled in 'the ai t, sideration of the Jfollowing' descrip @an when taken in conjunction with trie drawings, wherein Fig. 1 is: a diametric section of and clutch showing` it mounted on machine.

2 is a Section taken on 3 is a section is a. side elevation ho c Y D. 5 is an end elevation hoider.

rig. i 1.

6 is a section taken on "ina 7 is a perspectiv sleeve upon which V,the arni,y is mounted.

"e employed to ind 'e embodiment i SCT ard-type, having' a rearwardly project-ing hub 11', through which `the driving shalt 12 passes.

rotatably ljustable, axially fixed hub 14:, for supporting' the laminee of the field magnet 15, is provided with a rearwardly extending' smaller r iid 16 that neatly overlies the outwardly e: 'ending' iXed hub 11 of the machine. The hubi1s'i is split, as at 1T, in two diametric planes, at substantial right angles so that it may he compressed by the overlying' clamping ring 18, which is also split, as at 19, and adapted to be contracted by the screw :20. so. that the iield magnet may be moved about the shaft 12, to adjust it', and secured in selected position by the clamping' ring' 1S. Secured to the' clamping' ring 18. by screws 21., a brush holder 22, preferably ot' molded bakelite or other ina te ial similar to phenolic condensation prod ucts. The ring' 18 is provided with an integral segment extending' radially therefrom, through which the screws 21 pass for securiiin' the b usli holder in place thereon. The brush ho QQ may also be moved around lie sh 1Q on the hub 16, and secured in position by the screw QU, without @isti the position ot the field 1p i. r, 1 ,e e, r* i mi re, to plooi commutation. 4ine inner' ifield ture and the brush holder are tl able and it is only necessa 29 to connectv ,l the structure made 39 whichare molded in the body of the brush holder 22. The screws 38 are threadeddirectly into enlarged ends 40 of the metal stripst) and these heads are embedded in the body portion of the brush holder. The brush has at diam'etrically opposite ends, brush- .enclosing` mortises 4l within which the brushes 42 are slidably mounted, held yieldingly by springs 43, against the inner tace of the commutator 44. y

When the armature and the field magnet are connected in series in the circuit, the terminals of the field magnet coils may be connected to the screws 8G, 36', whereas it' the armature and field magnets are to be connected in parallel circuit the terminals of the field magnet are attached toI the screws 36 and 45 and 36 and 36 are connected'together. In Fig. 8, the lield magnet andthe armature are Shown to be connected in series, by this arrangement.

The eld magnet laminations l5 have their pole pieces 38 and 34 directly secured to the hub 14. The laminations l5 are self supporting, that is to say, they are cemented together so as not to require any other sup-l port, after which theymay be bored through and forced upon the non-magnetic hub 14, as a means for holding the field structure firmly in place.

The eommutator 44 consisting of a series of spaced apart bars, held together by an insulating ring which is composed, preferably, of bakelite and..r"abric 46 and Vis suitably secured in the armature shell 25, by any means that will properly support it therein.

The outer peripheral surface oi the armature shell 25 is preferably grooved, as at-47,

in which groove a belt may be attached whenit is desired te operate machinery other than the sewing machine, upon which the motor is mounted. j

The bearing hub 2T of the armature takes the place or" the hub of the ordinary tly wheel and is mounted upon the standard clutch sleeve 28. The clutch sleeve 28 is provided with a head 48 and on its smaller end it is provided with a transversely extending notch 49 and it is keyed to the shaft l2 by a pin 50 so that it is at all times rotatable with the shaft. 'The plate or ring 5l has inwardly extendingparts 52 that are received in the groove 49 of he sleeve 2S.

screwed tightly into the end of the sleeve 28, it causes the plate' lto bear with considerable frictional resistance upon the end of the hub 27 and causes the inner end of the hub 27 to bear with trictional Contact against the inner surface of the head-48, on the sleeve 28, thereby completing driving connection between the sha-ft l2 and the armature shell 25, so that when the'armature is rotated,

about .the field magnet, the shaft l2 is driven directly thereby. lVhen the thumb nut 29 is moved, so that the inner projecting end of the screw is' in Contact with one oi the ears 58, or near to a given ear, sufficient fric-v tion will have been exerted upon these parts to lcause completion of the driving connection, and when the thumb" nut 29 is moved in the opposite direction, by the hand of the operator for the purpose otl disconnecting the parts, the adjacent ear 53 limits its rotative. movement and prevents removal oi the nut, which, however, is sutiicient for the purpose, before the screw 54 reaches the ad jacent ear. y 4 I lV hen it becomes necessary to remove the parts, the screw may be taken from the nut, whereupon the nut may be screwed so that the hub 55 will leave the end of the sleeve 28'. after which the armature and shell may be removed from rthe sleeve, and when the pin 50 is removed, the entire motor structure may be talien from the supporting shaft l2. e

Having `described my invention, what I claim is z In a device of the character described a fixed hub; a shaft rotatable therein and projecting therebeyond in combination with a cup-shape member supportin, a motor element and having a split ring part overlying said hub and rotatable thereon, a clamping ring overlying the split ring part ol the cupshape member and rotatablethereong a brush holder mounted on the clamping ring and means to contact bota said ringsto independently adjust and tix the motor element and the brush holder to the fixed hub.

in testimony whereoin l hereunto subscribed my name.

` VlNGENT tm APPLE. 

